5.0.1 - Build Environment

Set the default gulp task to run in 'development' mode
5.0.1.a - Updated Directory

app_directory has been updated to directory
- Directories have been updated
5.0.2 - Task - clean

Added gulp clean
5.0.3 - Task - html

Added gulp task - html
5.0.4 - Task - scripts

Added gulp task - scripts
- concat
- uglify
5.0.5 - Task - images

Added the gulp task - images
- imagemin
5.0.6 - Task - sass

Added gulp task - sass
- gulp-sass
- gulp-autoprefixer
5.0.7 - Task - gulp

Combine html, images, sass and scripts into the default task
- watch
5.0.8 - Task - build

We added the gulp task for our production build
- NODE_ENV=production gulp build
5.0.8.a - Updated Code

Updates for cleaner code and efficiency
Merge branch 'Chapter-5'